package cn.pengge.springaop.reflection;

import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
import java.util.Map;

//通过反射获取泛型
public class Test11 {



    public void test01(Map<String,User> map, List<User> list){


        System.out.println("test01");

    }

    public Map<String,User>  test02(){
        System.out.println("test02");
        return null;
    }

    public static void main(String[] args) throws NoSuchMethodException {

        Method method = Test11.class.getMethod("test01", Map.class, List.class);

        Type[] genericParameterTypes = method.getGenericParameterTypes();
        for (Type genericParameterType : genericParameterTypes) {
            System.out.println("genericParameterType = " + genericParameterType);
            if (genericParameterType instanceof ParameterizedType) {
                Type[] actualTypeArguments = ((ParameterizedType) genericParameterType).getActualTypeArguments();
                for (Type actualTypeArgument : actualTypeArguments) {
                    System.out.println("actualTypeArgument = " + actualTypeArgument);
                }
            }
        }

        method = Test11.class.getMethod("test02",null);

        Type genericReturnType = method.getGenericReturnType();
        if (genericReturnType instanceof ParameterizedType) {
            Type[] actualTypeArguments = ((ParameterizedType) genericReturnType).getActualTypeArguments();
            for (Type actualTypeArgument : actualTypeArguments) {
                System.out.println("actualTypeArgument = " + actualTypeArgument);
            }
        }
    }
}
